This Application Problem is a part of the Lesson 8, Unit 4, Grade 2. At the school fair, 29 cupcakes were sold, and 19 were left over. How many cupcakes were brought to the fair? This problem is intended for guided practice to help students gain familiarity with the take from with start unknown problem type. The language of these problem types can be confusing to students. Guide students to see that when both parts are known, we add to find the total.